Abstract:
It is shown that the partition function of the free fermion model on a plane lattice has
a certain hidden symmetry. By means of a special elliptical parametrization for the
Boltzmann vertex weights, the partition function corresponding to one lattice site
(lattice-site partition function) is calculated and shown to be a meromorphic function
of three complex variables.
Citation:
V. V. Bazhanov, Yu. G. Stroganov, “Hidden symmetry of free fermion model. II. Partition function”, TMF, 63:2 (1985), 291–302; Theoret. and Math. Phys., 63:2 (1985), 519–527